Shoveling machine



March 10, 1925. 1,529,395

P. BURKE SHOVELING MACHINE Filed March 14,1923 2 Sheets-Sheet 1 WITNESSES INVENTOR M W CZZOZW;

' ATTORNEY March 10, 1925.

P. BURKE SHOVELING MACHINE Filgd Match 14, 1923 2 Sheets-Sheet 2 INVENTOR FMV M e" WITNESSES MS.

ATTORNEY any Patented Mar. 10, 1925 UNITED STATES.

PATENT OFFICE. 1

PAUL BURKE, OF GREEN BAY, WISCONSIN, ASSIGNOR TO NORTHWEST ENGINEERING COMPANY, OF GREEN BAY, WISCONSIN, A CORPORATION OF WISCONSIN.

SHOVELING MACHINE.

Application filed March 14, 1923. Serial No. 624,961..

To all whom it may concern:

Be it known that I, PAUL BURKE, a citlzen of the United States, and resident of Green Bay, in the county of Brown and State of Wisconsin, have invented a certain newand useful Improvement in Shoveling Machines, of which the following is a specifioatlon.

This invention relates to power-shovels, and more particularly to that type of shovel in which the hoisting rope or cable is used to actuate the thrust mechanism.

One of the objects of the invention is to improve and simplify power-shovels of the rope-thrusting type and to provide for the thrusting of the dipper handle without the usual gear mechanism or rack and ,PIDIIOIIS, or auxiliary driving apparatus of any kind, and to arrange the ropes or lines for controlling and actuating the dipper to good advantage.

A further object of the invention is to provide a shovel in which the two-part hoisting line for the dipper has a bight 1n endthrust engagement with the dipper handle.

The invention further consists in the sev eral features hereinafter set forth and more particularly defined by claims at the conclu sion hereof.

In the drawings: Fig. 1 is a side elevation of a power-shovel embodying the invention; Fig. 2 is a plan view thereof, partly in section; Fig. 3 is a sectional view through the stick-guiding mechanism.

In the drawings, the numeral 4 deslgnates the boom, which may be of any suitable construction, vertically pivotally attached at its lower end to a rotating base 5 of the machine, said base being of well known construction. A hoisting drum 6 and an auxiliary drum 7 are mounted on the base in suitable manner and driven from the prime mover (not shown) on the base.v The drums 6 and 7 may be of well-known construction equipped with clutches and brakes to control their operation. The boom 1s adapted to be raised or lowered in various positions of vertical adjustment by any wellknown means, such as a cable 8, shown in dotted lines, connecting pulleys 9 at the outer ends of the boom to parts on the rotating base. The boom shown is of the plate-girder type with the dipper handle or stick 10 workin between its sides 11.

e shipper shaft 12 is secured 1n a casting 13' mounted on the top of the boom and the saddle-block 1 1 is loose on said shaft and swings in front of it. The dipper handle 10 is preferably a single member having a metal covering 15. This handle is mounted to shde between the adjacent saddle-block 14 and a flanged roller and sheave 16. The

dipper or shovel 17 carried by the stick may be of any suitable construction.

The roller and sheave 16 is provided with a medially disposed guide groove 18 to form a sheave for the inward thrusting cable 19,

said cable passing from the drum 7 over the sheave 16 and anchored at its outer end 20 to the dipper handle or to the dipper. It will be noted that as the cable 19 passes over the groove 18 at the rear of the stick it will not interfere with the shifting or swinging movements of the stick relative to the boom.

Spaced sheaves 21 and 22 are mounted on a shaft 23 at the outer end portion of the boom and a padlock sheave 24 is mounted on the dipper transverse or at right angles to the axis of the sheaves 21 and 22.

As shown, a sheave 25 is loosely mounted on the shaft 12 and a sheave 26 is fixed to said shaft 12, but it may be loosely mounted thereon. The sheaves 25 and 26 are disposed outside of the saddle block.

The dipper handle has a sheave 27 mounted on the upper end, said sheave having its axis disposed transverse or atright angles to the axis for the sheaves 25 and 26 and bein of a diameter to bring the runs of the ca le passing over it tangent to the sheaves 25 and 26. V

The hoisting and thrusting cable 28 runs from the" drum 6 over a guide pulley 29 on the boom over the sheave 21, around the padlock sheave 24, over the sheave 22, around the sheave 25 and over the sheave 27 at the upper end of the stick and is anchored at its outer end to a cable clamp 30 on the periphcry of the sheave 26. Where the sheave 26 is loose on the shaft the cable extends around said sheave 26 and is anchored to the boom. This reevin of the cable produces a twopart line hoist portion for hoisting the dipper and a two-part line portion in end thrust engagement with the stick for crowding the dipper, and the cable 28 has its run on the stick maintained in the same relation thereto irrespective of the angular position of the stick with respect to the boom by the'sheave arrangement just described. While the cable 28 has been shown as having less than a full turn about the sheave 25, it may have more than one turn about said sheave, if desired, and the sheave is made with awide face for this purpose.

With the construction above described, when the drum 6 is prevented from turning by its brake, thereby holding the line or cable 19, and the line 28 is pulled in, the dipper moves in the are of a circle of which the dipper shaft is the center. If it is desired to crowd further into the bank or move the di per farther out, as in loading a wagon, t e braking effect on the line 19 is released slightly, whereupon the line 28, working over the upper end of the dipper stick, upon being pulled in forces or thrusts the dipper stick outward. Conversely, if it is desired to move the dipper farther-in and toward the boom, releasing the brake on line 28 and pulling in on line 19 by the operation of drum 7 produces this effect. Thus, by the proper manipulation and control of the lines 19 and 28 through the rotation or braking of the drums 6 and 7, any desired swinging or thrusting movement of the dipper and its handle may be effected. Furthermore, by the sheave arrangement above described the thrusting action is substantially as-great as the lifting action on the dipper. It .will also be noted that the thrusting action on the dipper is proportional to the load upon the dipper and to the resistance and weight of thematerial it' encounters during digging. A stop member 31 on the dipper handle may engage the roller 16 to limit the outward movement of-the dipper handle;

I desire it to be understood that this in vention is not to .be limited to any specific form or arrangement of parts exce t in so far as such limitations are specific in the claims. Q

What I claim as new and desire to secure by Letters Patent is:

1. In an excavating shovel, the combination of a supporting boom, a dipper and dipper handle, a shaft on the boom, a sheave loosely mounted on said. shaft, a sheave on the upper end ortion of the dipper handle, a sheave fixed y secured to said shaft, a

, hoisting and. thrusting cable between I,- the boom and dipper and passing from said loose sheave over the sheave on said handle and anchored to said fixed sheave, and separate means for moving said dipper inwardly.

a 2. In an excavating shovel, the combination of a supporting boom, a dipper and dipper handle, a shipper shafton the boom, a roller and saddle block journalled onsaid shaft and forming guide. means for said dipper handle whereby said dipper and sheave on said handle and onto the other sheave on said shaft, and a cable passing over said roller and directly connected to the dipper and dipper handle for. moving said dipper inwardly.

3. In an excavating shovel, the combination of a supporting boom, a dipper and dipper handle, spaced sheaves on the outer end portion of the boom, a padlock on the dipper having its axis transverse to the axis of said sheaves on the boom, a shaft on the boom, a sheave loosely mounted on said shaft, a sheave on the upper end portion of the dipper handle, a sheave fixed to said shaft, a hoisting drum, a cable extending from said drum over one of the sheaves on the outer end of the boom through said padlock and over the other sheave on the outer end of the boom and thence over said loose sheave and the sheave on said handle and anchored to said fixed sheave, and a separate cable for moving the dipper in- Wa-rdly.

4. In an excavating shovel, the combination of a supporting boom, a dipper and.

handle, a hoisting and thrusting cable having a two-part hoist line connection between the dipper and boom and passing from said loose sheave over the sheave on said handle and anchored to said fixed sheave; and a cable passing over said roller directly connected to the dipper and dipper handle for moving said dipper inwardly.

5. In an excavating shovel, the combination of a supporting boom, a dipper and dipper handle, a shaft on the boom, guide means for the dipper handle mounted on said shaft. sheaves mounted on said shaft outside of said guide means, a sheave onthe upper end portion of the dipper handle,

. a hoisting and thrusting cable between the boom and dipper and passing from one of said sheaves on said shaft over the sheave on said handle and onto the other sheave, and separate means for moving said dipper inwar 1y.

PAUL BURKE. 

